Headlight.



F. BUCHANAN.

. HEADLIGHT. APPLICATION FILED JUNE 12. I912.

2 SHEETS-SHEET 1.

A Ira/5N5 Y.

Patented Apr. 20, 1915.

F. BUCHANAN. HEADLIGHT. APPLICATION FILED JUNE 12, I9l2. 1,136,404.Patented Apr. 20, 1915.

2 sums-sum z.

WITNESSES like characters FRANK,IBUGHANAN, OF SYRACUSE, NEW YORK.

HEADLIGHT.

Specification of Letters Patent. 7

Patented Apr. 20, 1915.

Application filed June 12, 1912. Serial No. 703,234.

To all whom it may concern Be it known that I, FRANK BUCHANAN, a citizenof the United States, and a resident of Syracuse, in the county ofOnondaga and State of New York, have invented a certain new and usefulHeadlight, of which the following is a specification.

' This invention has for its object the production of a headlight havingan incandescent electric lamp provided with a plurality of filamentsarranged with their incandescing portions grouped together in order toincrease the power of the lamp; and the invention consists in thecombinations and constructions hereinafter set forth and claimed. I

In describing this invention reference is had to the accompanyingdrawings in which designate corresponding parts in all the views.

Figure 1 is a front elevation of a headlight embodying. my invention.Figs. 2 and 3 are vertical sectional views taken centrally of Fig. 1,the lamp in Fig. 3 being shown in one of its intermediate positionsoccupied when being placed in position or removed. Figs. 4 and 5 arefragmentary views illustrating the support for the upper fixture for thelamp, Fig. 4 showing such fixture and the support in side elevatlon, andFig. 5 being a horizontal'sectional view through the support.

This headlight comprises, generally, opposing pairs of terminals, and anincandes cent electric lamp having pairs of oppositely disposedterminals for connection with the first-mentioned terminals, the lampincluding filaments connected respectively to the pairs of terminalsthereof and arranged with their incandescing coils closetogether. o

1 is the casing of the headlight, and 2 and 3 are opposing supports orfixtures suitably secured" within the casing, each fixture carrying apair of terminals 4, 5.

6 is the incandescent electric lamp having a plurality of filaments 7, 8here shown, as extending radially toward the center of the lamp andterminating in incandescing 0011s 9 located close together, eachfilament 7, 8

being connected to a pair of terminals associated with the lamp anddesigned to con-' tact respectively with-the terminals 4, 5 of thefixture 2 or 3.

In the illustratedembodiment of my invention, the fixtures 2, 3 areformed with sockets 10, in which the terminals 4, 5 thereof are located;and the lamp has two pairs of prongs or terminals 11, 12 associatedtherewith, each pair 11, 12 being designed to enter the sockets 10 ofone of the fixtures 2, 3 and contact with the terminals 4, 5 therein.Each pair of prongs 11, 12 is here shown as carried by a socket 13having central and screw threaded terminals 14, 15 for engagingrespectively with the central terminal 16 and the screw threaded plugterminal 17 provided on the lamp, the pairs of terminals 16, 17 of thelamp being located diametrically opposite each other and being similarlythreaded so that, after the sockets 13 are screwed in position on theplugs of the lamp, turning and hence loosening of the lamp is prevented.Each pair of prongs 11, '12 is connected in any suitable manner with theterminals 14, 15 respectively of the corresponding socket 13.

The lamp 1s placed in position by a pivotal and axial movement, and oneof the fixtures 2, 3, here shown as the upper fixture, is pivoted on anaxis extending crosswise of the axis of the lamp 6, and is also movable.lengthwise of such axis, and, as here shown the fixtures 2, 3 aresupported by yokes 18, 19, and the yoke 18 supporting the upper fixture2 is connected to a supporting bracket 20 by pivot pins 21 on the yokewhich pins slide in vertical slots 22 1n the bracket 20. The axialmovement of the upper fixture 13 is resisted by a coil sprmg 23interposed between the intermedlate part of the yoke 18 and the bracket20.

Owing tothe arrangement of the lamp filaments, their greatestincandescing por-.

could -not be focusedwith any accuracy so as to throw a beam of lightstrong enough for headlight and search light purposes, but

,by my arrangement of the filaments of the incandescent electric lamprelatively to, the focal axisof the lens or reflector, a hght with anincandescent lamp of power great enough for headlights, is produced.

My headlight is particularly 'advanta geous in that standard fixturesand parts are used, such as the fixtures 2, 3, and the sockets 13, hencesimplifying the manufacture of the lamp.

Iii operation, the sockets 13 are screwed v in position on theplugs ofthe lamp 6, and the prongs 11, 12 of the upper socket inserted in thesockets 10 of the upper fixture 2 in contact with the terminals 4, 5thereof, the fixture 2 havin been previously shifted into the positionSmown in Fig. 3. The lamp is then pressed upwardly axially compressingthe spring 23 until the prongs 11,12 of the lower socket 13 are raisedhigh enough to clear the upper face of the lower fixture 3. The lamp isthen swung inwardly about the axis. of the prongs 11 and 12 of the lowersocket 13 are alined with the sockets 10 of the lower fixture 3. Thelamp is then permitted to be shifted axially by the spring 23 causingthe prongs 11 and 12 of the lower socket 13 to contact the terminals 4,5 of the lower fixture 3. Thus when .in position, the lamp cannot beturned loose by vibration.

What I claim is: V

1. A headlight comprising opposing fixtures, each having a pair ofcontact terminals, and an incandescent electric lamp having two pairs ofterminals associated therewith for coacting with the first-mentionedterminals, one ofthe fixtures being pivoted on an axis extendingtransversely relatively to the axisof the lamp, substantially as and forthe purpose set forth.

2. A headlight comprising opposing fixtures, each having a. pairof-contact terminals, and an incandescent electric lamp having two pairsof terminals associated therewith for coacting with the first-mentionedterminals, one of the fixtures being pivoted on. an axis "extendingtransversely relatively to the axis of the lamp, and being alsoshiftable axially forfacilitating placing and re moval of the lamp, anda spring for resisting the axial movement, substantially as and for thepurpose described.

' 3. A headlight provided with opposing fixtures, each having a .pair of"sockets and terminals in' the sockets, and an incandescent.

, electric lamp provided with two pairs of projecting terminals orprongs for entering the sockets and engaging the terminals there- 1n,substantially as and for the purpose pins 21 until the.

fixtures, each having a pair of sockets and terminals 'in the sockets,an incandescent electric lamp provided with two pairs of projectingterminals or plugs for entering the sockets and engaging the terminalstherein, one of the said fixtures being pivoted on an axis extendingtransversely of the axis of the lamp, and beingalso movable lengthwiseof the latter axis, and a spring forresisting the lengthwise movement ofsaid fixture, substantially as and for the purpose described. I

6. A headlight provided with opposing fixtures, each having a pair ofsockets and terminals in the sockets, an incandescent electric lamphaving two pairs of terminals,

each pair consisting of a central terminal so and screw threaded plug, aplug socket turning on each of the plugs'and having a pair of projectingterminals or prongs for entering the sockets of the correspondingfixture and engaging the terminals thereof, substantially as and for thepurpose specified.

7. A headlight provided with opposing fixtures, each having a pair ofsockets and terminals in the sockets, an incandescent electric lamphaving two pairs of terminals,

each pair consisting of a central terminal and screw threaded plug, aplug socket turning on each of the plugs and having-a pair of projectingterminals or prongs for entering the sockets of the correspondingfixture and engaging the terminals thereof, one of the fixtures beingpivoted on an axis extending transversely of the axis of the lamp, and

also being shiftable axially of the latter axis,

substantially as and for the purpose set10c forth.

8. A headlight provided with opposing fixtures, each having a pair ofsockets and terminals in the sockets, an incandescent electric lamphaving two pairs of terminals, .each pair consisting of a centralterminal and a screw threaded plug, a plug socket turning on each of theplugs and having a pair of projecting terminals or prongs for enteringthe sockets of the corresponding 11( fixture and engaging the terminalsthereof, one of the fixtures being pivoted on an axisextending'transversely of the axis of the .lamp, and also beingshiftable axially of the latter axis, and a spring for resisting theaxial movement, substantially as and for the purpose described.

- .In testimony whereof, I have hereunto signed my name in the presenceof two attesting witnesses, at Syracuse, in the county 12( of Onondaga,and State of New York, this 2d day of May, 1912.

FRANK BUCHANAN. Witnesses:

L. M. DAvIs, S. DAVIS.

